Possible Clues:

• 'You do it, __ will!'
• Brother of Dori and Nori, in “The Hobbit”
• "Either you do it — will"
• 'Either she goes ___ go!'
• '... -- will!'
• Tolkien dwarf
• "__ shall live your epitaph to make": Shakespeare's Sonnet 81
• "Either he goes, --- do!"
• "Either he goes ___ go!"
• You ___ (one of us)